## Abstract 3,5‐Diamino‐4‐phenylazo‐pyrazoles (**1a–1c**) react with acetylacetone and with ethyl acetoacetate to yield the corresponding pyrazolo[1,5‐a]pyrimidine derivatives **2a–2c** and **3a–3c**, respectively. Whereas **1a–1c** add readily to methyl acrylate yielding the 4,5,6,7‐tetrahydropyr
Conversions of 2-(2-Oxocyclohexylcarbonyl)benzoic Acid Derivatives to Pyrazolo[5,1-a]isoindole and Pyrimidine Rings.
✍ Scribed by Z. V. Voitenko; O. A. Pokholenko; I. S. Kondratov; V. O. Kovtunenko; C. Andre; J. G. Wolf
- Publisher
- John Wiley and Sons
- Year
- 2005
- Weight
- 20 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0931-7597
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## Abstract magnified image __E__‐3‐(__N,N__‐Dimethylamino)‐1‐(3‐methylthiazolo[3,2‐__a__]benzimidazol‐2‐yl)prop‐2‐en‐1‐one (**2**) was synthesized by the reaction of 1‐(3‐methylthiazolo[3,2‐__a__]benzimidazol‐2‐yl)ethanone (**1**) with dimethylformamide‐dimethylacetal. The reaction of **2** with